"Production Unit" within the REMIT Regulation compliance system means a facility for generation of electricity made up of a single generation unit or of an aggregation of generation units.
The definition is relevant for REMIT reporting purposes, however, the term is identically understood by Article 2(24) of the Regulation on submission and publication of data in electricity markets.
See also:
10 MW REMIT reporting threshold - manageable by the way of contracting